| 11. | During the Carboniferous period Laurentia joined with another continent called Gondwana.
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| 12. | This type of Sedimentary bedrock was formed in the Carboniferous period.
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| 13. | It lived 300 million years ago during the late Carboniferous period.
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| 14. | The deposits were formed 350 million years ago during the Carboniferous period on Gondwana.
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| 15. | A large part of its core consists of granite massifs from the Carboniferous period.
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| 16. | The oldest fossil ultisols are known from the Carboniferous period when forests first developed.
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| 17. | The polar ice cap of the Carboniferous Period covered the southern end of Pangaea.
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| 18. | The reptiles appeared from labyrinthodonts in the subsequent Carboniferous period.
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| 19. | It preserves fossils dating back to the Jurassic Pennsylvanian subperiod of the Carboniferous period.
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| 20. | During the Carboniferous period ( 363-290 Ma ), Scotland lay close to the equator.
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